Connection structure of flexible wiring substrate and connection method using same

1. A connection structure of a flexible wiring substrate for electrically connecting an inkjet head to a circuit board that supplies a drive signal that is applied to the inkjet head; wherein the inkjet head comprises a plurality of channels that eject ink onto a recording medium and a plurality of head terminals to which the drive signal is applied for ejecting ink from the plurality of channels; wherein the flexible wiring substrate has a plurality of terminal lands arranged respectively corresponding to the plurality of head terminals on one face of a strip-shaped insulator having flexibility, a plurality of leads being independently connected with the respective plurality of terminal lands; wherein the one face of the insulator is covered with an insulating film and a plurality of exposure holes are provided in the insulating film that respectively expose the plurality of terminal lands; wherein the terminal lands and the head terminals are directly electrically connected by conductive adhesive getting into the plurality of exposure holes; and wherein the insulator film of the flexible wiring substrate facing the peripheral region of the inkjet head is directly connected with the peripheral region through conductive adhesive.

2. A connection structure of a flexible wiring substrate for electrically connecting an inkjet head to a circuit board that supplies a drive signal that is applied to the inkjet head; wherein the inkjet head comprises a plurality of channels that eject ink onto a recording medium and a plurality of head terminals to which the drive signal is applied for ejecting ink from the plurality of channels; wherein the flexible wiring substrate has a plurality of terminal lands arranged respectively corresponding to the plurality of head terminals on one face of a strip-shaped insulator having flexibility, a plurality of leads being independently connected with the respective plurality of terminal lands; wherein the one face of the insulator is covered with an insulating film and a plurality of exposure holes are provided in the insulating film that respectively expose the plurality of terminal lands; wherein the terminal lands and the head terminals are directly electrically connected by conductive adhesive getting into the plurality of exposure holes; and wherein a common electrode of the inkjet head arranged on the peripheral region of the inkjet head, that is taken to be at earth potential, and earth wiring of the flexible substrate facing the common electrode are directly electrically connected through conductive adhesive.

3. An inkjet printer, comprising: an inkjet head; a circuit board that supplies drive signal that is applied to the inkjet head; and a flexible wiring substrate which electrically connects the inkjet head and the circuit board; wherein the inkjet head comprises a plurality of channels that eject ink onto a recording medium and a plurality of head terminals to which the drive signal is applied for ejecting the ink from the plurality of channels; wherein the flexible wiring substrate has a plurality of terminal lands arranged respectively corresponding to the plurality of head terminals on one face of a strip-shaped insulator having flexibility, a plurality of leads being independently connected with the respective plurality of terminal lands; wherein the one face of the insulator is covered with an insulating film and a plurality of exposure holes are provided in the insulating film that respectively expose the plurality of terminal lands; wherein the terminal lands and the head terminals are directly electrically connected by conductive adhesive getting into the plurality of exposure holes; and wherein a common electrode of the inkjet head arranged on the peripheral region of the inkjet head, that is taken to be at earth potential, and earth wiring of the flexible substrate facing the common electrode are directly electrically connected through conductive adhesive.